Alarm-lock



- (No Model.) Y

. G. J. KELLER.

. ALARM LOOK.

No. 417,731; Patented Dec. 24, 1889.

Fig. 3, a detail view of the handle by which will enable others skilledin the art to which UNITED STATES PATENT. OFFICE.

GEORGE J. KELLER, OF OSCEOLA, NEBRASKA.

ALARM- LOC K.

SPECIFICATION forming part of Letters Patent No. 417,731, dated December24, 1889.

Application filed August 27, 1889- To all whom it may concern:

I Be it known that I, GEORGE J. KELLER, a citizen of the United States,residing at Osce- 01a, in the county of Polk and State of -Nebraska,have invented certain new and use- Irnprovements in Alarm-Looks; and Idodeclare the following to be a full, clear, and exact description of theinvention, such as it appertains to make and use the same, referencebeing had to the accompanying drawings, and to the letters of referencemarked thereon, which form a part of this specification.

The special object of the invention is to make an alarm-lock for theprotection of banks, depots, and post-offices against the depredationsof thieves and burglars. The invention will first be described inconnection with the drawings, and then pointed out in the claims.

Figure 1 of the drawings is a horizontal sectional view of lock, door,and door-frame; Fig. 2, a side elevation as seen from the inside ofhouse, with the face-plate removed; and

the lock is opened from the inside.

In the drawings, A represents a door, and B the door-frame; O, the boltswhich slide into the catch D, in order to lock the door; E, thelever-handles by which the bolts are worked from the outside; F, thehandle by which the door is opened from the inside,and G the metallicsou ndin g-board which the bolts strike to givethe alarm. The bolts 0are each provided with two holes 0 for the end of the lever, which willsimply throw them out of the catch it placed in the one to the right,but if placed in the one to the left will hold them out of the catch andthrow them back against the sounding-plate. The levers E are fulcrumedat e, and provided with a finger-piece e forconvenience in handling.They are also surrounded by a protectingcase E, and are arranged behinda door-handle I-I.

The bolts C have each aprojection c',which extends through theface-plate I, on which are the stud-pivots '6, whereon the handle FSerial No. 322,135. (No model.)

is pivoted. hen it is desired to open the door from the inside, thehandle F is moved to the right, the barf of the handle striking theprojections c and moving all the bolts used in the combination to theright. so as to open the door. These bolts are maderound from the rearend up to theleft-hand hole 0 and from thence to the front are madesquare.

The coil-springs about the bolts lie between the levers and the posts J.through which the bolts pass.

In order to form a combination, remove the face-plate and place thelever ends in the right-hand hole a of those bolts which are to remainin the catch, and in the other bolts put the lever ends in theleft-l1and hole 0 so as to hold them out of the catch. Then the door.will only open when all the bolts in the catch are thrown back, while ifany.of those. not in the catch are thrown back the alarm will besounded.

Ofcourse many diiferent combinations may be used, and a greater or lessnumber of bolts.

that I claim as new, and desire to protect by Letters Patent, is

1. In a keyless lock, the slide-bolts 0,-having the holes andcoil-springs specified, in combination with thelevers E, fulcrumed at e,and provided with finger-pieces, as described.

2. The handle F, having the barf, in combination with the bolts 0,having the projec-- tions 0', whereby the door may be opened from theinside, as set forth.

3. In an alarm-lock, the bolts C, having each a projection c, holesc cand spiral springs 0 in combination with the levers E, fulcrumed at e,and provided with the fingers e, the handles F f, alarm-plate Gr, andposts J J, all arranged and operating together as and for the purposeset forth.

In testimony whereof I affix my signature in presence of two witnesses.

GEORGE J. KELLER.

\Vitnesses:

OSCAR N. KELLER, STEPHEN B. MOFFETT.

